Veneer-cutter.



No. 674,562. Patented May 2|, l90l. F KBAUS VENEER CUTTER.

Application filed Mar. 5, 1900.)

(No Model.)

7MB ponms Perms cu. mTo-uma. wAsmN UNITED STATES PATENT OFFICE.

FRIEDRICH KRAUS, OF MEMEL, GERMANY.

VENEER-CUTTER.

SPECIFICATION forming part of Letters Patent No. 674,562, dated May 21, 1901.

Application filed March 5, 1900. Serial No. 7,273. (No model.)

To all whom it may concern:

Be it known that I, FRIEDRICH KRAUS, a subject of the Emperor of Germany, residing at Memel, in the Empire of Germany, (and whose post-office address is No. at Marktstrasse, Me mel, Ge'rmany,) have invented certain new and useful Improvements in Machines for Cutting Veneers and Boards from Thick Planks, Round Wood, and the Like, of which the following is a specification.

The object of this invention is to provide a machine for cutting veneers, boards, and the like, and in which machine the contact-bar carrier is hinged or pivotally connected to the knife-head body in such manner as that the contact-bar in any position travels with the knife-head body always parallel to the edge of the knife and only requires to be adjusted by means of an elastically-mounted lever to the exact thickness to which the veneer or board is to be cut. The knife-head thus constructed is then attached to the machine in such manner that it makes a vertical and simultaneously an endwise movement in an in clined position, so that it passes through the wood with a draw-cut action. The peculiar mounting ofthe contact-bar in the knife-head body and the peculiar operation of such a combined knife-head and contact-bar carrier allows of a reliable and absolutely equal or even cutting of the veneer or board being obtained.

The invention is shown in the accompanying drawings, in which- Figure 1 is an elevation of the machine, and Fig. 2 a section of the knife-head.

Referring to the drawings, the knife head or body consists of a cross-piece or casting A, adapted to move in two end guide-checks b. Connecting-rods d are attached to the knifehead by pivotal connections a, which connecting-rods are operated by means of an eccentric or crank e. The driving of the same is effected by means of any suitable dev-ice y. In this manner the knife head or body is moved up and down vertically. In order to obtain a draw-cut motion-that is, a movement proceeding simultaneously endwise-a link f is pivotally connected, as at g, to the upper edge of the knife-head A. This link is hinged or pivoted to the frame of the machine at the point h, so that it moves in a segment of a circle about said point when the knife-head is operated, and consequently the knife-head must move out endwise. The whole movement of the same'thus takes place obliquely downward and a peculiar cut is produced, as the knife is to a certain extent drawn through the Wood similarly to the action of a knife in cutting bread. This peculiar cutting device necessitates, however, a quite peculiar arrangement of the knife 19 with respect to the contact-bar n.

It is necessary that the contact-bar n shall always remain parallel to the knife-edge, no matter what the thickness of the out. For this object the knife-head A consists of a castmetal body 1', to the lower end or edge of which the carrier is of the contact-bar is pivotally mounted or hinged by means of a long bolt Z. Levers m are fixed on the carrier is, by means of which levers the said carrier may be turned on the pivot Z, so that the contactbar n describes a segment of a circle. In consequence of this pivotal connection the contact-bar carrier, and with it the contact-bar, always stands parallel to the edge of the knife in any position into which the bar may be turned, so that the thickness of the veneer maybe easily adjusted at any time by means of the lever m. The point of rotation or hingeZ of the contact-bar carrier in the head A is so chosen that the contact-bar always assumes the most suitable position to the knife-edge that is to say, the pivot Z is located in a line which extends from the knife-edge at an angle of approximately forty-five degrees to the vertical plane of the cutting edge of the knifeso that a sharp and clean cut is obtained, the shaving or veneer always passing between the knife and contact-bar without impinging on either. The knife 19 and also the contact-barn are fixed to their respective supports by means of screws 0.

The carrier or support q of the knife p is fixed to the body 1' by means of the screws 0. The contact-bar n is held in its actual position at any time relative to the knife by means of the levers m. These levers m are fixed by means of a device arranged as follows: An eyelet r is fixed t0 the body't', which eyelet carries a spindle t, revoluble on a point .9, so that the position of the lever may be altered without trouble. A scale is preferably formed on the spindle, which is adapted to indicate the thickness of the veneer to be cut.

The levers are mounted as follows: A bush u, supporting the levers 'm, is arranged to move or travel in a casing or support '0, an elastic materialsuch, for instance, as a springbeing located in the space to. When, therefore, a stronger substancesuch, for instance, as a knotis encountered between the contact-bar and the knife, the bush u is pressed in such manner against the elastic material or spring that the latter yields until the resistance is overcome.

A sharper and more exact cut is obtained by the machine hereinbefore described,so that perfectly-even veneers or boards free from cracks are obtained.

Having thus described the nature and object of my invention, what I claim as new, and desire to secure by Letters Patent, is

In a machine of the character described, a knife-head, comprising a cross-piece to which the knife is secured, means for moving said head and knife downward and outward with a draw-cut movement, a contact-bar carrier hinged to the lower edge of the knife-head, parallel to the knife-edge, a contact-bar secured to said carrier in alinement with the knife-edge, lever-arms secured to the carrier and adapted to oscillate said carrier upon its pivotal support, a bolt for each lever-arm pivotally secured at one end to the knife-head and traversing the free end of said lever-arm, a bushing supporting each lever-arm and adapted to slide on each bolt, and a spring adapted to force each bushing and lever-arm inward toward the knife-head and to yieldingly support each lever-arm, substantially as and for the purposes described.

In witness whereof I have hereunto signed my name, this 13th day of February, 1900, in the presence of two subscribing witnesses.

FRIEDRICH KRAUS.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

